The only thing more predictable than a Diddy name change? His place atop our annual list of the wealthiest hip-hop artists. But the man formally known as Sean Combs now has some real competition. Jay Z's fortune has jumped 30% in the past year after a $200 million investment from Sprint reportedly put the valuation of his music-streaming service, Tidal, at $600 million, more than 10 times what he paid for the company two years ago. (Forbes)